CATH Classification

Domain Context

CATH Clusters

Superfamily Sulfate adenylyltransferase
Functional Family bifunctional 3'-phosphoadenosine 5'-phosphosulfate synthase 1

Enzyme Information

2.7.7.4
Sulfate adenylyltransferase.
based on mapping to UniProt O43252
ATP + sulfate = diphosphate + adenylyl sulfate.
-!- The human phosphoadenosine-phosphosulfate synthase (PAPS) system is a bifunctional enzyme: ATP sulfurylase, which catalyzes the formation of adenosine 5'-phosphosulfate (APS) from ATP and inorganic sulfate and the second step is catalyzed by the APS kinase portion of 3'-phosphoadenosine 5'-phosphosulfate (PAPS) synthase, which involves the formation of PAPS from enzyme bound APS and ATP. -!- This is in contrast to what is found in bacteria, yeasts, fungi and plants, where the formation of PAPS is carried out by two individual polypeptides, EC 2.7.7.4 and EC 2.7.1.25.
2.7.1.25
Adenylyl-sulfate kinase.
based on mapping to UniProt O43252
ATP + adenylyl sulfate = ADP + 3'-phosphoadenylyl sulfate.
-!- The human phosphoadenosine-phosphosulfate synthase (PAPS) system is a bifunctional enzyme: ATP sulfurylase, which catalyzes the formation of adenosine 5'-phosphosulfate (APS) from ATP and inorganic sulfate and the second step is catalyzed by the APS kinase portion of 3'-phosphoadenosine 5'-phosphosulfate (PAPS) synthase, which involves the formation of PAPS from enzyme bound APS and ATP. -!- This is in contrast to what is found in bacteria, yeasts, fungi and plants, where the formation of PAPS is carried out by two individual polypeptides, EC 2.7.7.4 and EC 2.7.1.25.

UniProtKB Entries (1)

O43252
PAPS1_HUMAN
Homo sapiens
Bifunctional 3'-phosphoadenosine 5'-phosphosulfate synthase 1

PDB Structure

PDB 1XNJ
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
The crystal structure of human PAPS synthetase 1 reveals asymmetry in substrate binding
Harjes, S., Bayer, P., Scheidig, A.J.
J.Mol.Biol.